Brake.



J. A. WILLIAMS.

BRAKE. APPLICATION FILED JUNE 21, 1913.

Patented June 23, 1911 Brakes; and I do ignition of the UNITED sTATEsPATENT OFFICE.

BRAKE.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed .Tune 21, 1913. SerialNo. 775,018.-

To all whom it may concern I Be it known that I, JOHN ALBERT W1L- LIAMS,a citizen of the United States, residing at McColl, in the county ofMarlboro, State of South Carolina, have invented certain new and usefulImprovements in hereby declare the following to be a full, clear, andexact descriptlon of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to brakes and particularly to the band type usedon automobiles. i

The object of the invention resides in the provision of a brake of thecharacter named which is designed to be magnetically controlled andoperated through the medlum of an electric circuit supplied from thesource which maintains the lightingand the engine of an automobile. Withthe above and other ObJGCtS in view I the invention consists in detailsof construction and in the arrangement and combination of parts to behereinafter more fully described and articularly pointed out in theappended clhims.

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of reference denotecorresponding eral views, and in which- Figure 1 is a front elevation ofa brake constructed in accordance with the inven-' tion; Fig. 2, asection on the line 2-2 of Fig. 1. Fig. 3, a view similar to Fig. 2

showing the parts in the position they would occupy when the brake isapplied, and Fig. 4, a section on the line 44 of Fig. 2.

Referring to the drawings 10 indicates an automobile wheel which hassecured thereto in the usual and well known manner a brake drum A. Thewheel 10 is fixed to an axle B which is. surrounded by a casing C pro- 1vided with a flange 11 disposed adjacent the inner end of the drum A.Mounted on the flange 11 is an L-shaped arm 12 which carries a pin 13extending over the periphery of the drum A. A1

so mounted upon the flange 11 is one arm of an L-shaped plate 14, theother arm of said plate being disposed parallel to the periphery of thedrum and provided with a slot 15 for a purpose that will presentlyappear. It will be noted that the arm 12 is disposed diametricallyopposite to the plate 14 said arm 12 being parts in the sevat the upperend A, while the plate 14 is at the lower end thereof. Pivoted u n thepin 13 is a frame 16 the opposite si e members of which are providedwith longitudinal slots 17 respectively and slidably engaged in theseslots is a pivot pin 18. Surrounding the periphery of the drum A is abrake band 19 the intermediate portlon of which is offset to form'a seatfor a brake shoe 20'the inner face of said brake shoe nal portions ofthe brake band 19. Projecting outwardly from the brake band 19 is a stud21 which extends into the slot 15 arid is movable in said slot durin ofthe brake. .The termina s of the brake band 19 have ivotally connectedthereto respectively linl r s 22 and 23. These links are in turnrespectively connected to the pivot pin 18 by means of links 24 and 25.Mounted upon the brake band 19 adjacent the ends thereof respectivelyare magnets 26 and 27 the coils of which are connected to each other bya conductor 28 and also connected to a suitable source of electricity Eby conductors 28 and 29 respectively. Included in the circuit whichenergizes the magnets 26 and 27 is a rheostat 30 whereby the strength ofthe magnets 26 and 27 may be readily controlled. This rheostat may besituated at any convenient point on the automobile such as the steeringcolumn.

In the operation of the brake it will be apparent that when the rheostatis operated to close the circuits of the magnets 26 and 27 said magnetswill be energized and at- --.tracted to the periphery of the frame A.This movement of the magnets 26 and 27 will carry a portion of the band19 into engagement with the drum A and the friction arising between theframe and band will cause the latter to respond to the rotation of thedrum which response is arrested by the links 22, 23, 24 and 25 with theresult that the band will pull the brake shoe a ainst the periphery ofthe drum A with sucient force to produce the proper brakage. It will benoted that through the medium of the rheostat 30 the force with whichthe brake shoe 20 is applied to the drum may be readily controlled.

What-I claim is 1. In combination with a rotatable ele- -ment, of a drumfixed to the element, a band surrounding the drum, an arm secured to arelativelyfixed part, a stud carried'by the registering with the innerface of the termi the operation ment, of a drum fixed to the element, aband surrounding the drum, an arm secured to a relatively fixed part,astud carried by the arm and overlying the periphery of the drum, aslotted member pivoted on said stud, a pin movable in the slots of saidmember, flexible connection between the pin and respective ends of theband, magnets mounted on the band adjacent each end thereof, and meansfor energizing said magnets.

In testimony whereof, I aflix my signature, in the presence of twowitnesses.

JOHN A. WILLIAMS. Witnesses F. F. ADAMS, W. R. FLETCHER.

